#646CB1#646CB1

#646CB1 is a mid, moderate blue. Relative luminance 0.166; OKLCH L 55.5% C 0.107 H 277.3°. Best body text is #FFFFFF at 4.86:1 contrast (WCAG AA passes).

Color values

HEX	#646CB1
RGB	rgb(100, 108, 177)
HSL	hsl(234, 33%, 54%)
HSV	hsv(234, 44%, 69%)
CMYK	cmyk(43.5%, 39%, 0%, 30.6%)
CIE-LAB	lab(47.76, 15.20, -37.72)
CIE-LCH	lch(47.76, 40.67, 291.94°)
OKLab	oklab(55.54% 0.0136 -0.1062)
OKLCH	oklch(55.54% 0.107 277.3)
XYZ	xyz(18.5515, 16.6079, 43.8146)
Luminance	0.1661 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646CB1 #B1A964

analogous

#6493B1 #646CB1 #8364B1

triadic

#646CB1 #B1646C #6CB164

tetradic

#646CB1 #B16493 #B1A964 #64B183

square

#646CB1 #B16493 #B1A964 #64B183

split-complementary

#646CB1 #B18364 #93B164

monochromatic

#343967 #485090 #646CB1 #8D93C5 #B5B9DA

Accessibility & contrast

On white

4.86

#646CB1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.32

#646CB1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646CB1

4.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646CB1	#FFFFFF	#000000	##FFFFFF
##646CB1	1.00	4.86	4.32	4.86
#FFFFFF	4.86	1.00	21.00	1.00
#000000	4.32	21.00	1.00	21.00
##FFFFFF	4.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5374B4

Deuteranopia (green-blind)

#4E6EAF

Tritanopia (blue-blind)

#4B7A86

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #646cb1;
/* rgb */ color: rgb(100, 108, 177);
/* oklch */ color: oklch(55.5% 0.107 277.3);

Tailwind

colors: {
  custom: {
    50: '#9496c8',
    500: '#646cb1',
    950: '#000000',
  },
}

SCSS

$custom: #646cb1;
$custom-light: #9496c8;
$custom-dark: #000000;

JSON

{
  "hex": "#646cb1",
  "rgb": {
    "r": 100,
    "g": 108,
    "b": 177
  },
  "hsl": {
    "h": 233.766,
    "s": 33.047,
    "l": 54.314
  },
  "oklch": {
    "l": 0.55538,
    "c": 0.10711,
    "h": 277.3
  },
  "luminance": 0.16609
}

Semantic roles & 50–950 ramp

primary

#646CB1

secondary

#C9C5A8

accent

#BE5FC9

background

#F9F9FC

surface

#F2F1F8

border

#CCCBD1

text

#0D0D13

muted

#7E7E82

Preview Lab

Preview with #646CB1

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →